Class: Arel::Nodes::ValuesTable

Inherits:
Node
  • Object
show all
Defined in:
lib/activerecord-updateinbulk/arel/nodes/values_table.rb

Overview

Represents the VALUES table constructor as an Arel node. Mirrors Arel::Table behavior by requiring a name at construction time. Column names are also required because adapter defaults vary; prefer using the default names from connection.values_table_default_column_names(width) to keep the generated query simple.

This is a private class that may be used by typecasting logic in custom adapters.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name, rows, columns) ⇒ ValuesTable

name - The table name (required to mirror Arel::Table). rows - An array of arrays; each inner array is one row of values. columns - An array of column name strings, typically from

<tt>connection.values_table_default_column_names(width)</tt>.



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# File 'lib/activerecord-updateinbulk/arel/nodes/values_table.rb', line 20

def initialize(name, rows, columns)
  @name = name.to_s
  @width = rows.first.size
  @rows = rows
  @columns = columns.map(&:to_s)
end

Instance Attribute Details

#columns ⇒ Object (readonly)

Returns the value of attribute columns.



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# File 'lib/activerecord-updateinbulk/arel/nodes/values_table.rb', line 13

def columns
  @columns
end

#name ⇒ Object (readonly) Also known as: table_alias

Returns the value of attribute name.



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# File 'lib/activerecord-updateinbulk/arel/nodes/values_table.rb', line 13

def name
  @name
end

#rows ⇒ Object (readonly)

Returns the value of attribute rows.



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# File 'lib/activerecord-updateinbulk/arel/nodes/values_table.rb', line 13

def rows
  @rows
end

#width ⇒ Object (readonly)

Returns the value of attribute width.



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# File 'lib/activerecord-updateinbulk/arel/nodes/values_table.rb', line 13

def width
  @width
end

Instance Method Details

#[](name, table = self) ⇒ Object 



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# File 'lib/activerecord-updateinbulk/arel/nodes/values_table.rb', line 27

def [](name, table = self)
  name = columns[name] if name.is_a?(Integer)
  name = name.name if name.is_a?(Symbol)
  Arel::Attribute.new(table, name)
end

#alias(table = name) ⇒ Object 



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# File 'lib/activerecord-updateinbulk/arel/nodes/values_table.rb', line 37

def alias(table = name)
  Arel::Nodes::TableAlias.new(grouping(self), table)
end

#eql?(other) ⇒ Boolean Also known as: ==

Returns:

  • (Boolean) 


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# File 'lib/activerecord-updateinbulk/arel/nodes/values_table.rb', line 49

def eql?(other)
  @name == other.name && @rows == other.rows && @columns == other.columns
end

#from(table = name) ⇒ Object 



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# File 'lib/activerecord-updateinbulk/arel/nodes/values_table.rb', line 33

def from(table = name)
  Arel::SelectManager.new(table ? self.alias(table) : grouping(self))
end

#hash ⇒ Object 



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# File 'lib/activerecord-updateinbulk/arel/nodes/values_table.rb', line 45

def hash
  [@name, @rows, @columns].hash
end

#to_cte ⇒ Object 



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# File 'lib/activerecord-updateinbulk/arel/nodes/values_table.rb', line 41

def to_cte
  self.alias.to_cte
end